Table 4 Grain yield in machine-transplanted double-cropped rice grown under different sowing periods in 2015 and 2016.
Season | Cultivar | Sowing date delay (days) | Yield (t/ha) | Panicle m−2 | Spikelet panicle−1 | Filling ratio (%) | Grain weight (mg) |
|---|---|---|---|---|---|---|---|
2015 ER | ZZ39 | +0 | 6.01 | 240 | 110 | 90.1 | 25.6 |
+5 | 6.88 | 264 | 103 | 87.8 | 25.7 | ||
+10 | 6.84 | 258 | 117 | 89.1 | 25.6 | ||
+15 | 5.99 | 214 | 135 | 83.6 | 24.8 | ||
2016 ER | ZZ39 | +0 | 8.61 | 312 | 128 | 81.6 | 24.3 |
+5 | 7.68 | 342 | 114 | 83.5 | 25.0 | ||
+10 | 7.90 | 291 | 132 | 77.1 | 25.1 | ||
+15 | 7.39 | 259 | 130 | 80.3 | 24.4 | ||
LLY268 | +0 | 7.01 | 387 | 100 | 75.4 | 24.7 | |
+5 | 7.36 | 379 | 89 | 82.8 | 24.9 | ||
+10 | 6.72 | 382 | 105 | 59.7 | 24.1 | ||
+15 | 6.12 | 381 | 106 | 65.8 | 24.0 | ||
+0 | 7.36 ± 1.31a | 322 ± 74a | 113 ± 14a | 81.4 ± 7.4a | 24.8 ± 0.7a | ||
+5 | 7.36 ± 0.40a | 337 ± 59a | 102 ± 13a | 84.3 ± 2.7a | 25.2 ± 0.4a | ||
+10 | 6.82 ± 0.65a | 305 ± 64a | 118 ± 14a | 73.5 ± 14.8a | 24.9 ± 0.8a | ||
+15 | 6.56 ± 0.77a | 306 ± 86a | 122 ± 16a | 75.7 ± 9.5a | 24.4 ± 0.4a | ||
LSD0.05 | 1.60 | 135 | 26 | 18.1 | 1.1 | ||
2015 LR | HY518 | +0 | 6.57 | 383 | 91 | 82.8 | 25.1 |
+5 | 6.85 | 367 | 82 | 76.1 | 25.3 | ||
+10 | 7.22 | 350 | 91 | 79.4 | 24.6 | ||
+15 | 5.07 | 360 | 101 | 74.4 | 24.6 | ||
+20 | 5.83 | 398 | 75 | 64.5 | 24.8 | ||
2016 LR | HY518 | +0 | 8.81 | 396 | 130 | 78.6 | 24.8 |
+5 | 8.19 | 401 | 125 | 77.8 | 23.6 | ||
+10 | 8.57 | 446 | 111 | 72.4 | 26.0 | ||
+15 | 6.90 | 480 | 116 | 59.9 | 25.4 | ||
+20 | 5.38 | 502 | 137 | 45.6 | 22.9 | ||
TY390 | +0 | 7.55 | 431 | 133 | 80.8 | 20.5 | |
+5 | 8.89 | 413 | 135 | 73.1 | 22.4 | ||
+10 | 6.42 | 437 | 127 | 61.5 | 22.8 | ||
+15 | 5.09 | 442 | 145 | 54.2 | 20.3 | ||
+20 | 3.27 | 561 | 118 | 35.5 | 18.9 | ||
+0 | 7.64 ± 1.12ab | 409 ± 25a | 126 ± 23a | 80.2 ± 2.1a | 22.9 ± 2.6a | ||
+5 | 7.98 ± 1.04a | 401 ± 24a | 123 ± 28a | 75.6 ± 2.4ab | 23.3 ± 1.5a | ||
+10 | 7.40 ± 1.09ab | 429 ± 53a | 115 ± 18a | 68.8 ± 9.0ab | 24.4 ± 1.6a | ||
+15 | 5.69 ± 1.05bc | 429 ± 61a | 115 ± 22a | 59.5 ± 10.4bc | 23.1 ± 2.7a | ||
+20 | 4.83 ± 1.37c | 512 ± 83a | 120 ± 32a | 44.0 ± 14.7c | 21.4 ± 3.0a | ||
LSD 0.05 | 2.07 | 98 | 46 | 16.6 | 4.3 |
